Thread: Switch Case error: expected identifier before 'R'

  1. #1
    Registered User
    Join Date
    Nov 2019
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    5

    Switch Case error: expected identifier before 'R'

    Compiler show error expected identifier before 'R'

    Code:
    #include<stdio.h>
    
    
    
    int main (void)
    
    
    {
    	enum colour {'R', 'G', 'Y'}TrafficLight;
    	
    	scanf("%c", TrafficLight);
    	
    	switch(TrafficLight)
    	{
    		case 'R': 
    		        printf("Red Light\n");
    				break;
    		case 'G':  
    		       printf("Green Light \n");
    			   break;
    		case 'Y':  
    		       printf("Yellow Light\n");
    			   break;
            default:
                   printf("Light OFF \n");				   
                   break;			   
    	}
    	
    	return 0;
    	
    }

  2. #2
    C++ Witch laserlight's Avatar
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    27,234
    You probably just want to declare TrafficLight as a char here and not bother with the enum.
    Quote Originally Posted by Bjarne Stroustrup (2000-10-14)
    I get maybe two dozen requests for help with some sort of programming or design problem every day. Most have more sense than to send me hundreds of lines of code. If they do, I ask them to find the smallest example that exhibits the problem and send me that. Mostly, they then find the error themselves. "Finding the smallest program that demonstrates the error" is a powerful debugging tool.
    Look up a C++ Reference and learn How To Ask Questions The Smart Way

  3. #3
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    Quote Originally Posted by laserlight View Post
    You probably just want to declare TrafficLight as a char here and not bother with the enum.
    Program only except integer value so why it doesn't except character input

    Code:
    #include<stdio.h>
    
    int main (void)
    
    
    {
    	enum colour {R, G, Y}TrafficLight;
    	
    	scanf("%d", TrafficLight);
    	
    	switch(TrafficLight)
    	{
    		case R: 
    		        printf("Red Light\n");
    				break;
    		case G:  
    		       printf("Green Light \n");
    			   break;
    		case Y:  
    		       printf("Yellow Light\n");
    			   break;
            default:
                   printf("Light OFF \n");				   
                   break;			   
    	}
    	
    	return 0;
    	
    }

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